string: Added a function to delete a char basesd stirng object.

include/libssh/libssh.h

@@ -449,6 +449,7 @@ LIBSSH_API ssh_string ssh_string_from_char(const char *what);
 LIBSSH_API size_t ssh_string_len(ssh_string str);
 LIBSSH_API ssh_string ssh_string_new(size_t size);
 LIBSSH_API char *ssh_string_to_char(ssh_string str);
+LIBSSH_API void ssh_string_free_char(char *s);
 
 #ifndef LIBSSH_LEGACY_0_4
 #include "libssh/legacy.h"

libssh/string.c

@@ -142,6 +142,15 @@ char *ssh_string_to_char(struct ssh_string_struct *s) {
   return new;
 }
 
+/**
+ * @brief Deallocate a char string object.
+ *
+ * @param[in] s         The string to delete.
+ */
+void ssh_string_free_char(char *s) {
+    SAFE_FREE(s);
+}
+
 /**
  * @brief Copy a string, return a newly allocated string. The caller has to
  *        free the string.